Navickas, Z., Telksnys, T., Timofejeva, I., Marcinkevičius, R. and Ragulskis, M. (2018) “An operator-based approach for the construction of closed-form solutions to fractional differential equations”, Mathematical Modelling and Analysis, 23(4), pp. 665-685. doi: 10.3846/mma.2018.040.